Flask, factory. How to start celery worker?

Question

Flask

I can't figure out how to start celery worker.
The application starts via cli
autoapp.py:

# -*- coding: utf-8 -*-
"""Create an application instance."""

from flask.helpers import get_debug_flag

from myapp.app import create_app
from myapp.settings import DevConfig, ProdConfig

CONFIG = DevConfig if get_debug_flag() else ProdConfig

app = create_app(CONFIG)

extensions.py

# -*- coding: utf-8 -*-
"""Extensions module. Each extension is initialized in the app factory located in app.py."""
from flask_bcrypt import Bcrypt
from flask_caching import Cache
from flask_debugtoolbar import DebugToolbarExtension
from flask_login import LoginManager
from flask_migrate import Migrate
from flask_sqlalchemy import SQLAlchemy
from flask_wtf.csrf import CsrfProtect
from flask_celery import Celery

bcrypt = Bcrypt()
csrf_protect = CsrfProtect()
login_manager = LoginManager()
db = SQLAlchemy()
migrate = Migrate()
cache = Cache()
debug_toolbar = DebugToolbarExtension()
celery = Celery()

app.py

def create_app(config_object=ProdConfig):
    """An application factory, as explained here: http://flask.pocoo.org/docs/patterns/appfactories/.

    :param config_object: The configuration object to use.
    """
    app = Flask(__name__.split('.')[0])
    app.config.from_object(config_object)
    register_extensions(app)
    register_blueprints(app)
    register_errorhandlers(app)
    register_shellcontext(app)
    register_commands(app)
    return app


def register_extensions(app):
    """Register Flask extensions."""
    assets.init_app(app)
    bcrypt.init_app(app)
    cache.init_app(app)
    db.init_app(app)
    csrf_protect.init_app(app)
    login_manager.init_app(app)
    debug_toolbar.init_app(app)
    migrate.init_app(app, db)
    celery.init_app(app)
    return None

In the terminal

celery -A myapp.extensions.celery worker

[2017-02-15 16:34:05,823: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 111] Connection refused.
Trying again in 2.00 seconds...

in redis config. Does not pick up the configuration.

Answer 1

Read slides.skien.cc/flask-hacks-and-best-practices/#17 Stuffed
initialization into
autoapp.py:

# -*- coding: utf-8 -*-
"""Create an application instance."""

from flask.helpers import get_debug_flag

from myapp.app import create_app
from myapp.settings import DevConfig, ProdConfig
from myapp.extensions import celery
from myapp.utils import init_celery

CONFIG = DevConfig if get_debug_flag() else ProdConfig

app = create_app(CONFIG)
init_celery(app, celery)

util.py:

def init_celery(app, celery):
    celery.conf.update(app.config)
    TaskBase = celery.Task
    class ContextTask(TaskBase):
        abstract = True
        def __call__(self, *args, **kwargs):
            with app.app_context():
                return TaskBase.__call__(self, *args, **kwargs)
    celery.Task = ContextTask

launched

celery worker --app=autoapp.celery --loglevel=debug